What Actually Moves the Stock Market?

Turn on the news and the market seems to move on everything — a tweet, a rumour, the weather. It can feel random.

It isn't. Over any meaningful horizon, share prices answer to a small set of forces. Here they are.

A share is a slice of a business

It's easy to forget, but a stock isn't a lottery ticket. It's part-ownership of a real company. Own a share and you own a sliver of that company's future profits. So anything that changes those expected profits — or how investors feel about them — changes the price.

Force 1: Earnings

Over years, prices track profits. A company that grows its earnings tends to become more valuable; one whose earnings stall or shrink tends to struggle. Most long-term stock returns trace back to this simple engine.

Force 2: Interest rates

Here's the less obvious one. A rupee of profit ten years from now is worth less to you than a rupee today — and how much less depends on interest rates. When rates rise, future profits are "discounted" more heavily, which can pull prices down even if the business is fine. When rates fall, the reverse.

Force 3: Expectations

This is the big one for daily moves. Markets are forward-looking. Prices already reflect what everyone expects. So what moves them is the surprise — results that come in better or worse than the crowd assumed.